Impacts of the 2016 Kumamoto Earthquake on glycemic control in patients with diabetes.

On April 14 and 16 2016, the Kumamoto area was severely damaged by several massive magnitude 7 class earthquakes. To examine the effects of these earthquakes on glycemic control and stress factors, glycated hemoglobin, glycated albumin, other biochemical parameters, a self-administered lifestyle-associated questionnaire and disaster-associated stress scores were analyzed. A total of 557 patients with diabetes were enrolled, and data were collected at 13 months before to 13 months after the earthquakes. In patients with type 1 diabetes and specific types of diabetes due to other causes, glycemic control was not altered during the observational period. This glycemic stability in type 1 diabetes might result from self-management of insulin doses. In patients with type 2 diabetes, glycated hemoglobin decreased by 0.11% (from 7.33 to 7.22%) at 1-2 months after the earthquakes, and increased thereafter. The reduction of glycated hemoglobin after 1-2 months in type 2 diabetes was associated with 'early restoration of lifelines' and 'sufficient sleep.' The glycemic deterioration at a later stage was related to 'shortage of antidiabetic agents,' 'insufficient amount of food,' 'largely destroyed houses' and 'changes in working environments.' Disaster-associated stress levels were positively correlated with 'age,' 'delayed restoration of lifelines,' 'self-management of antidiabetic agents' and 'increased amount of physical activity/exercise,' and negatively associated with 'early restoration of lifelines' and 'sufficient sleep.' Glycemic control, associated factors and stress levels are altered in chronological order. Post-disaster diabetic medical care must consider these corresponding points in accordance with the time-period.

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© 2018 The Authors. Journal of Diabetes Investigation published by Asian Association for the Study of Diabetes (AASD) and John Wiley & Sons Australia, Ltd.